Design of an Area-Efficient Survivor Path Unit for Viterbi Decoder Supporting Punctured Codes 


Vol. 29,  No. 3, pp. 337-346, Mar.  2004


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  Abstract

Punctured convolutional codes increase transmission efficiency without increasing hardware complexity. However, Viterbi decoder supporting punctured codes requires long decoding length and large survivor memory to achieve sufficiently low bit error rate (BER), when compared to the Viterbi decoder for a rate 1/2 convolutional code.
This paper presents novel architecture adopting a pipelined trace-forward unit reducing survivor memory requirements in the Viterbi decoder. The proposed survivor path architecture reduces the memory requirements by removing the initial decoding delay needed to perform trace-back operation and by accelerating the trace-forward process to identify the survivor path in the Viterbi decoder. Experimental results show that the area of survivor path unit has been reduced by 16% compared to that of conventional hybrid survivor path unit.

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  Cite this article

[IEEE Style]

S. Kim and S. Hwang, "Design of an Area-Efficient Survivor Path Unit for Viterbi Decoder Supporting Punctured Codes," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 3, pp. 337-346, 2004. DOI: .

[ACM Style]

Sik Kim and Sun-young Hwang. 2004. Design of an Area-Efficient Survivor Path Unit for Viterbi Decoder Supporting Punctured Codes. The Journal of Korean Institute of Communications and Information Sciences, 29, 3, (2004), 337-346. DOI: .

[KICS Style]

Sik Kim and Sun-young Hwang, "Design of an Area-Efficient Survivor Path Unit for Viterbi Decoder Supporting Punctured Codes," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 3, pp. 337-346, 3. 2004.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880